OK, just read about supercavitating torpedoes where a gas bubble is
formed behind the nose of the torpedo in which the drag is much less
than if he torpedo was immersed in water. Sometimes the gas bubble is
formed by compressed gas.
So.........
Put millions of tiny holes in your hull through which you force
compressed air to radically reduce your drag. This sounded great till
I realized that then there would be a lot less bouyancy